51results about How to "Excellent unwinding property" patented technology

A surface protection sheet including a base layer and a pressure-sensitive adhesive layer which have been formed by coextrusion. The surface protection sheet has satisfactory suitability for unwinding from a roll, etc., and the pressure-sensitive adhesive layer has a smooth surface and satisfactory adhesion to rough surfaces, is free from release ingredient transfer thereto, and hence poses no problem concerning contamination. The surface protection sheet comprises: a base layer comprising a thermoplastic resin; a pressure-sensitive adhesive layer formed on one side of the base layer; and a back treatment layer formed on the other side and comprising a polyethylene resin. The surface protection sheet is characterized in that the base layer, pressure-sensitive adhesive layer, and back treatment layer have been integrally formed by coextrusion molding and the pressure-sensitive adhesive layer contains a noncrystalline polyolefin elastomer in an amount of 50 wt.% or larger.

The invention discloses ultra-strong antistatic spandex spinning oil and a preparation method thereof. The ultra-strong antistatic spandex spinning oil is prepared from 40 to 80% mass of polydimethylsiloxane, 5 to 30% mass of white oil, 1 to 10% mass of organosilicon quaternary ammonium salt, 0.1 to 10% mass of metallic stearate and 0.1 to 10% mass of graphene, wherein the percentage content is the mass percentage of the component content to the total oil mass. The novel material ultra-strong antistatic graphene is mixed into the spandex spinning oil, and the prepared spandex spinning cake has good formation, is easy to unwind and has strong antistatic property.

The invention discloses a polyurethane fiber dry spinning oil agent, which comprises 30 to 80 weight percent of dimethyl silicon oil, 10 to 50 weight percent of mineral oil, 1 to 7.5 weight percent of high-carbon isomeric fatty alcohol or acid, 1 to 5 weight percent of dispersed component, 0.1 to 1.5 weight percent of stearate and 2 to 20 weight percent of antistatic component. The dispersed component is a mixture of an organic silicon surfactant and acrylic acid-maleic acid copolymer, and the weight ratio of the organic silicon surfactant to the crylic acid-maleic acid copolymer is 1:0.5-2; and the antistatic component is a mixture of polyether silicon oil and nonionic isomeric alcohol polyethenoxy ether, and the weight ratio of the polyether silicon oil to the nonionic isomeric alcohol polyethenoxy ether is 1:0.5-2. The polyurethane fiber dry spinning oil agent has excellent smoothness, softness, antistatic property, stable performance and excellent anti-adherent performance; polyurethane fiber treated by the oil agent has good unreeling property and forming property; and in the subsequent processing flow, polyurethane filaments are easy to unreel, not drop edge and has few broken filaments.

The invention discloses a polyurethane fibre spinning oil. Its composition includes (by wt%) 5-80% of mineral oil, 10-75% of silicone oil, 0.5%-30% of epoxyethane and epoxypropane copolyether, 0.5%-50% of polyether silicone oil, 0.5-15% of antistatic agent and 0.1-10% of anti-sticking property improving agent.

During the production of cross-wound bobbins, the yarn wound onto the cross-wound bobbins is reciprocated by means of a yarn guide, which can be controlled independently of the drive of the cross-wound bobbins and determines the laying width. Here, the laying width is variable. A portion of the cheese layer has a different width than the rest. The rhombus of the cheese layer is all closed. The invention can be installed in the winding position of spinning machines producing cross-wound bobbins and improves package density, uniformity and unwinding performance of cross-wound bobbins.

A method for forming a conical cross-wound bobbin by rotor spinning yarn by the following winding the yarn package, that is in a winding process, a crossing angle alpha in the middle section is smaller than that of the other parts of the winding process, and an across alpha M is created between 15-28 degrees in the middle zone, which is produced with this angle across alpha M more than 50% of the total winding width B WG.

The invention relates to a preparation agent for dry method urethane elastic fiber spinning. The preparation agent comprises the following components: silicone resin, methyl silicone oil, modification silicone oil, mineral oil and antistatic agent. The preparation method comprises the following steps: 1, silicane chain links(M, X, Y and Z) are mixed and evenly stirred, started, added with acid water at a temperature of 25 DEG C and reacted for 1 hour at the temperature of between 60 and 70 DEG C, stirring stops, after layering, the resin on the lower layer is separated out, the pH value of the resin is neutral by washing, and the resin is subjected to vacuum pumping, temperature rise and dewatering to prepare the silicone resin; and 2, the silicone resin, the methyl silicone oil, the polyether modification silicone oil, the mineral oil and the antistatic agent are placed in a stirring kettle, and evenly mixed at the temperature of between 10 and 50 DEG to obtain. The application of the preparation agent is as follows: the preparation agent is put in a storage tank and transferred to an oil nozzle or roller by an oil pump, and the urethane elastic fiber is directly contacted and oiled. The preparation agent for dry method urethane elastic fiber spinning is transparent liquid, does not contain solid particle components such as hard ester acid magnesium and the like, does not plug pipes and equipment in the oiling process, and does not need power-off cleaning, thereby improving production efficiency.

A winding method for forming a cylindrical shape bobbin is provided, whereby, an intersection angle (alpha) is varying while the yarn is winded. To guide yarn, a yarn intersection angle (alpha M) at the center zone in the bobbin winding process is between 15-28 degrees and the yarn intersection angle (alpha R) towards the edge zones of two ends of the winding package is larger than that of the center zone.

The invention relates to spandex spinning oil with a function of enabling exterior-interior unwinding to be uniform, and a preparation method of the spandex spinning oil. The spandex spinning oil is prepared by mixing a component A and a component B, wherein the component A is prepared from the following components by weight: 80-92% of dimethyl silicone oil, 1-10% of modified silicone oil, 0.5-5%of silane containing special functional groups and 1-8% of silicon resin; the component B is prepared from the following components by weight: 80-90% of mineral oil, 5-15% of a W / O type emulsifying agent, 1-5% of an antistatic agent and 0.5-2% of modified magnesium stearate; the mixing ratio of the component A to the component B is equal to (1.5 to 1)-(1 to 1.2). The oil which is prepared by the method and is used for polyurethane elastic fibers is yellowish transparent liquid, and not only can enable spandex fibers to have excellent formability in a winding process, but also has higher surface energy and has stronger adsorption to polyurethane so as to enable the polyurethane not to easily migrate to the surfaces of the fibers from the inner layers of the fibers, thus endowing the spandexfibers with more uniform exterior-interior unwinding and further enabling the spandex fibers to be smoothly unwound and not to be broken in the subsequent application.

To provide a polyurethane elastic yarn that is superior in unwinding properties and adhesive properties in respect to a hot melt adhesive agent, and to provide a manufacturing method thereof. A polyurethane elastic yarn wherein the main structural component of the polyurethane is a polymer diol or diisocyanate; and includes a polymer that includes, as the main structural unit, a structural unit that uses an aromatic olefin and / or an aliphatic diolefin as a monomer, and is partially hydrogenated or completely hydrogenated.

Provided are: a treating agent for elastic fibers that are excellent in terms of adhesion to hot-melt adhesives, unwindability, and smoothness; and elastic fibers that are excellent in terms of adhesion to hot-melt adhesives, unwindability, and smoothness. The treating agent for elastic fibers comprises a component (I) which is at least one compound selected from among higher alcohols, polyhydric alcohols having a valence of 3-6, alkylene oxide adducts of higher alcohols, and alkylene oxide adducts of polyhydric alcohols having a valence of 3-6 and a component (II) which is at least one oil selected from among mineral oils and ester oils, the weight proportion of the component (I) in the treating agent being 21-90 wt%.

The invention relates to an easy-unwinding spandex and a preparation method thereof. The specific preparation method is as follows: Step 1. Prepolymerization: mixing and reacting diphenylmethane diisocyanate MDI and polytetramethylene ether glycol PTMG to generate isocyanate group NCO End-capped prepolymer PP; Step 2. Chain extension: Dissolve PP in N,N-dimethylacetamide DMAC using a high-speed rotator and pass the solution through a rotating reactor where chain-extending amine is added , end-capped amine to obtain the POL stock solution; step 3. ripening: add functional additives (antioxidant, dyeing auxiliaries, lubricants, anti-yellowing agents, etc.) in the POL stock solution, mature for a certain period of time, add alkali-soluble polyester, After stirring and dispersing evenly, the DOPE stock solution is obtained; Step 4. Spinning and forming: the above-mentioned DOPE is pumped to the spinneret after removing impurities through the filter, and then dried in the tunnel to remove DMAC, then soaked in a high-temperature lye pool, and dried with hot air After drying, cooling and shaping, oiling is done to obtain spandex. At the same time, in the production process, the spinnability of the spinning dope is good.